send a binary json message to a tcp server in javascript

To send a binary JSON message to a TCP server in JavaScript, you need to first create a TCP client, convert the JSON data into a binary format, and then send it using the TCP client.

Here's an example code snippet that demonstrates how to achieve this using the Node.js net module:

index.tsx
const net = require('net');
const json = { foo: 'bar' }; // JSON data to send as a binary message

const client = new net.Socket();

client.connect(8080, 'localhost', () => {
  console.log('Connected to server');

  const data = JSON.stringify(json);
  const message = Buffer.from(data, 'utf8'); // convert JSON data to a binary buffer

  client.write(message); // send the binary message to server
});

client.on('data', (data) => {
  console.log(`Received response from server: ${data}`);
});

client.on('close', () => {
  console.log('Connection closed');
});
563 chars
22 lines

In the above code, we first create a TCP client using the net module and connect to the server. In the connection callback function, we convert the JSON data to a binary buffer using the Buffer.from() method and send it to the server using the client.write() method.

When the client receives a response from the server, the data event is triggered and we log the response to the console. Finally, we handle the close event to log a message when the connection is closed.